edison



2 Sheets-Sheet 1.

T. A. EDISON.

REGULATOR FOR DYNAMO ELECTRIC MACHINES.

(No Model.)

Patented Mar. 20, 18.88.

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(N0 Model.)

2 Sheets-Sheet 2.

T. A. EDISON.

REGULATOR FOR DYNAMO ELECTRIC MA-GHINES.

A mulliiiiiiiul II III IIIIIIIIIII WITNESSES Patented M81". 20, 1888. 6 5 6 INVENTOR:

ATTORNEY I UNITED STATES PATENT OFFICE.

THOMAS A. EDISON, OF MENLO PARK, NEW JERSEY, ASSIGN OR TO THE EDISON ELECTRIC LIGHT COMPANY, OF NEW YORK, N. Y.

REGULATOR FOR DYNAMO-ELECTRI C MACHINES.

SPECIFICATION forming part of Letters Patent No. 379,771, dated March 20, 1888.

Application filed August 'I, 1882. Serial No. 68,026. (No model.) Patented in England August 5, 1882, No. 3.570; in Italy November 29, 1882, No. 14,825; in Belgium November 30, 1882, No. 59,593,- in France January 18, 1883, No. 151,725; in Spain April 4, 1883, No. 3.736, and in Germany December 2|, 1883, No. 25,000.

Belgium, No. 59,593, November 30, 1882;

France, No. 151,725, January 18, 1883'; Spain,

. No. 3,736, April 1, 1883, and in Germany, No.

25,000, December 21, 1883;) and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The object I have in view is to produce a method and means for deriving from a dynamoelectric machine two or more independent circuits in which there will be a different electro-motive force or pressure, such circuits being adapted for independent regulation. The extra circuit (or circuits) will have a lower electro-motive force than the main circuit, and is designed more especially for use in energiz ing the field-of-force magnet of the machine or for operating translating devices, of which incandescing electric lamps form the best example, placed in multiple-arc circuits and requiring a current of lower tension than the lamps or other translating devices in the main circuit; or this extra circuit may have both the magnet-coils and the lamps connected therewith in multiple arc.

This object I accomplish by arranging to bear upon the commutator-cylinder on each side of one of the main commutator'brushes a secondary brush, which is mounted so as to be capable of adjustment toward or away from the main brush independent of or together with its fellow 0n the other side of the main brush. These two secondary brushes are connected together electrically, and from them is led one part of the secondary circuit, the other part being connected with the main brush on that side of the commutator-cylinder. The farther apart the secondary brushes are placed on opposite sides of the main brush the greater will be the tension of the current in the extra dent that in this manner two extra circuits 7 could be derived from the same machine instead of one, a set of secondary brushes being arranged to form a circuit with each main commutator-brush. In that case it will be seen that the extra circuits themselves may be regulated independently of each other or together, and may have currents of the same or different tension. It will also be understood that one secondary brush instead of two could be used in connection with a main brush to form each extra circuit, which secondary brush would be mounted for adjustment to and from the main brush forming the other pole of the extra circuit, and in this manner almost any desired number of extra circuits could be derived from one machine, the tension of the current in each depending upon the distance of the secondary brush from the main brush with which itis connected. It is also evident that an extra circuit could be formed by placing two secondary brushes on opposite sides of the commutator-cylinder at points between the main brushes, the secondary brushes forming the poles for the extra circuit, and the ten sion of the current in the extra circuit being dependent upon the position of these brushes with relation to the line of neutralized generareference to the drawings, in which Figure l is a view, partly diagrammatic, illustrating my present invention and showing the form first described, with the secondary brushes mounted for simultaneous adjustment; Fig. 2, a View of the same arrangement when the secondary brushes are independently adjustable, and Figs. 3 and views of other arrangements for accomplishing the same object.

A is the armature, B the commutator-cylindcr, and O the field-of-force magnet, of the machine.

D D are the main commutator-brushes, which are mounted so as to be adjustable upon the commutator-cylinder. From these brushes run the main conductors 1 2 in multiple are or derived circuits 3 4, from which are the lamps or other translating devices, a. The secondary commutator-brushes E E, Figs. 1 and 2, bear on the commutator-cylinder on opposite sides of the main brush D. From the secondary brushes E E and the main brush D runs the extra circuit 5 6. The coils of magnet G and lamps or other translating de vices, b, are in multiple are or derived circuits 7 8 from the conductors 5 6. These translating devices do not require a current of as high a tension as that required by the translating devices a.

In Fig. l the secondary brushes E E are shown as carried by a pivoted arm, 0, so that they can be adjusted simultaneously in opposite directions toward and away from the main brush D. In Fig. 2 they are carried by separate and independently-adjustable arms (Z (15."

In Fig. 3 a single secondary brush, F, is

shown as used to form one pole for the extra circuit 5 6, the other pole being formed by one of the main brushes.

In Fig. 4 the secondary brushes G G are mounted to bear on opposite sides of the commutatoncylinder at points between the main brushes, and the conductors of the extra circuit are connected only with the secondary 5 brushes.

I do not claim herein the arrangement of in candescing electric lamps or other translating devices in multiple are on separate circuits derived from main and auxiliary com m utatorbrushes bearing on the same commutator, for this will form the subject of a separate application for Letters Patent.

\Vhat I claim isl. The combination, with a dynamo-electric machine having a continuously-wound bobbin and a single commutator, of two or more circuits having currents of different tension derived from said commutator, and means for independently regulating the tension of the cur rents in said circuits, substantially as set forth.

2. The combination, with a dynamo-electric machine havingacontinuously-wound bobbin and a single commutator, of main commutatorbrushes and one or more auxiliary brushes bearing on said commutator, two or more circuits connected with said brushes, and the fieldof-force magnet of the machine, having its coils in one of said circuits, substantially as set forth.

3. The combination, with a dynamo-electric machine having a continuously-wound bobbin and asingle commutator, ofmain com mututorbrushes and one or more auxiliary brushes bearing on said commutator, two circuits connected with said brushes, the field-of-force magnet of the machine, having its coils in the circuit of the auxiliary brush or brushes, and means for adjusting said auxiliary brush or brushes independent of the main brushes for regulating the machine, substantially as set forth.

This specification signed and witnessed this 28th day of February, 1882.

THOMAS A. EDISON.

\Vitnesses:

H. W. SEELY, THOMAS JoHNs'roN. 

